## Common Core Standard 8.G.9

The surface area of a cone is the outside covering of the cone. Finding the surface area of a cone involves finding the lateral area and adding this to the base area of the cone.

## What is a cone in geometry?

A cone is a three-dimensional geometric shape. The base of a cone is circular in shape.

A cone has only one vertex.

Two common types of cones are the

**right cone**and the**oblique cone**A right cone has its apex positioned over the cones center of the base.

The apex of a oblique cone is not positioned over the center of the cone’s base

In summary… To find the

**follow these steps.***surface area of a cone*- Find the lateral area of a cone using:

- πradius x slant height of the cone

- Find the base area of the cone using:

- πradius squared

- Add the Lateral area plus the base area